AFTER having observed in a man and noted down one, two, three, and then a multitude of, sentiments, do these suffice and does your knowledge of him seem complete? Does a memorandum book constitute a psychology? It is not a psychology, and here, as elsewhere, the search for causes must follow the collection of facts. It matters not what the facts may be, whether physical or moral, they always spring from causes; there are causes for ambition, for courage, for veracity, as well as for digestion, for muscular action, and for animal heat. Vice and virtue are products like vitriol and sugar; every complex fact grows out of the simple facts with which it is affiliated and on which it depends. We must therefore try to ascertain what simple facts underlie moral qualities the same as we ascertain those that underlie physical qualities, and, for example, let us take the first fact that comes to hand, a religious system of music, that of a Protestant church. A certain inward cause has inclined the minds of worshipers toward these grave, monotonous melodies, a cause much greater than its effect; that is to say, a general conception of the veritable outward forms of worship which man owes to God; it is this general conception which has shaped the architecture of the temple, cast out statues, dispensed with paintings, effaced ornaments, shortened ceremonies, confined the members of a congregation to high pews which cut off the view, and governed the thousand details of decoration, posture, and all other externals. This conception itself again proceeds from a more general cause, an idea of human conduct in general, inward and outward, prayers, actions, dispositions of every sort that man is bound to maintain toward the Deity; it is this which has enthroned the doctrine of grace, lessened the importance of the clergy, transformed the sacraments, suppressed observances, and changed the religion of discipline into one of morality. This conception, in its turn, depends on a third one, still more general, that of moral perfection as this is found in a perfect God, the impeccable judge, the stern overseer, who regards every soul as sinful, meriting punishment, incapable of virtue or of salvation, except through a stricken conscience which He provokes and the renewal of the heart which He brings about. Here is the master conception, consisting of duty erected into the absolute sovereign of human life, and which prostrates all other ideals at the feet of the moral ideal. Here we reach what is deepest in man; for, to explain this conception, we must consider the race he belongs to, say the German, the Northman, the formation and character of his intellect, his ways in general of thinking and feeling, that tardiness and frigidity of sensation which keeps him from rashly and easily falling under the empire of sensual enjoyments, that bluntness of taste, that irregularity and those outbursts of conception which arrest in him the birth of refined and harmonious forms and methods; that disdain of appearances, that yearning for truth, that attachment to abstract, bare ideas which develop conscience in him at the expense of everything else. Here the search comes to an end. We have reached a certain primitive disposition, a particular trait belonging to sensations of all kinds, to every conception peculiar to an age or to a race, to characteristics inseparable from every idea and feeling that stir in the human breast. Such are the grand causes, for these are universal and permanent causes, present in every case and at every moment, everywhere and always active, indestructible, and inevitably dominant in the end, since, whatever accidents cross their path being limited and partial, end in yielding to the obscure and incessant repetition of their energy; so that the general structure of things and all the main features of events are their work, all religions and philosophies, all poetic and industrial systems, all forms of society and of the family, all, in fine, being imprints bearing the stamp of their seal.